{
  "annotation_id": "925ad522-58b3-4964-b50c-6ede5a8f1fdb",
  "date_created": "2026-03-02T18:00:53.557000Z",
  "date_modified": "2026-03-02T18:00:53.557000Z",
  "file_hash": "0f84ac27ab05eea4b12a266c293451a9e9566dd983323ced43230695bccf988f",
  "private": false,
  "record": {
    "abstract": "Defocused speckle photography has long been used to measure rotations of\nrough surfaces. This paper explains how, by adding a suitably perforated mask,\nsome measurement properties, such as range or lateral resolution, may be\nchanged at wish. Particularly, the maximum measurable tilt can be significantly\nraised, although at the expense of poorer lateral resolution. Advantages over\npreviously described techniques include independent tuning of speckle size and\noptical system aperture and more extended adaptability to different measuring\nneeds. The benefits and disadvantages of the new and old techniques are\nthoroughly compared.",
    "arxiv_id": "physics/0409094",
    "authors": [
      "Jose M. Diazdelacruz"
    ],
    "categories": [
      "physics.optics",
      "physics.ins-det"
    ],
    "doi": "10.1364/AO.44.002250",
    "title": "Multi-windowed defocused speckle photographic system for tilt   measurement",
    "url": "https://arxiv.org/abs/physics/0409094"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "1d1740af-c536-4ad9-b2bb-3bbfac588f3e",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}